Legendary Creature Angel Nightmare Avatar Flying Super Nova As this creature transforms into Sephiroth, One-Winged Angel, you get an emblem with "Whenever a creature dies, target opponent loses 1 life and you gain 1 life." Whenever Sephiroth attacks, you may sacrifice any number of other creatures
Now how do we finish the job
Choosing from the entire list of non-creature spells means we have almost limitless choices available, but usually the best picks are effects that support a creature-combat plan (like combat tricks or defensive interaction), or which generate resources to fuel more spellcasting
This is a repeatable token generator that also spots you a free spell at some point, and some decks would be interested in playing this even if it didn't have the hideaway text
Any time one of your slivers might be destroyed, just flip a coin and theres a chance itll survive